Machine for forming and applying liquid spray



April 27, 1937. w. K. ANDREW MACHINE FOR FORMING AND APPLYING LIQUID SPRAY Filed June 2'7, 1935 2 Sheets-Sheet l IINVENTOR ATTORNEY A ril 27, 1937. w. K. ANDREW 78,

MACHINE FOR FORMING AND APPLYING LIQUID SPRAY File'd June 27, 1935 2 Sheets-Sheet 2 V Z5 Z4- Z2 34 59 42 I I 7 44 INVENTOR 6/ MA m Md MM ATTORNEY actress mourns you remain Lia Wam drew, Wauwatosa, Wis. Application dune 2'3, i935, Serial No. sacs:

22 (Claims.

This invention relates to spray forming and directing apparatus, more especially for applying liquidsover the 'surlace of materials in the form of separate drops or spray, and particularly to a form of device which provides for continuous operation on moving materials.

in the past materials have been sprayed by operation of an air blast directedv against the material to be treated. Such operation has a variety of objectionable features. It does not produce uniformsi'ze or distribution of the in-, dividual spray particles. It tends to rapidly evaporate the sprayed "material; Perhaps one of the most objectionable features of air blast spray operation is the spray material which is carried away by the moving air, whereby anything adjaccnt to the surfaces which it is desired to spray also becomes coated. Suction devices to avoid this efi'ect are not practicable because any sumciently strong suction destroys or diverts the, spray. v I

It is a purpose oi this invention to overcome these and va ious other objectionable features of previous spray devices.

Another purpose of the invention is to provide improved means. for forming. a spray of finely divided particles of liquid material.

Aiurther purpose relates to improved means for controlling the average size of the individual particles of a sprayed material, and for producing a uniform distribution thereof.

A further purpose is'to provide improved means for directihg the sprayed material and for controlling the area to be sprayed thereby, particularly where'the spray is applied to moving materials. A further purpose is generally to simplify and improve the construction and operation of spray machines and machines for similar and analogous uses, and still other purposes will be apparent from the specification. o

The invention consists in the construction and comblnation'of parts as herein illustrated, de-

; scribed and claimed and in such modifications of the structure described as may-be equivalent to the structure of the claims. l

The same reference characters have been used throughout to indicate the' same parts,- and in the drawings:

Fig. 1 is an end elevationof a. structure incorporating the invention, and of a portion of a sup porting structure therefor.

Figure 2 is a plan view, partly in section; taken approximately along line 2-4 of Fig. 1.

(Cl. QL-Ad) line t--@ of Fig. 3.

Fig. 7 is an enlarged partial section along line 10 i-l or Fig. 2. v 4

The machine here shown includes a support l, which jmay'be a portion of the structure of a prlntingpress, or other machine for traversing paper or other material to which liquid is to be applied. Support l carries feeding rolls ii, i,

for guiding and traversing a strip or band of material such as i, the material .beingin this instance further guided by a. table or platen b. It will be understood that the material d is traversed endwise as by rotary motion applied to roll 2 from a suitable source, not shown- A housing or casing t is carried by or adjacent to the support l and within the housing are a plurality of axially parallel roll members i, d, disposed transversely to the direction of move= ment of the strip d. The roll l is carried in suitable fixed bearings, such as the bearing 9, respectively at oppositeends of the casing 6, and of a form restraining the roll from axial movewent. Roll 3 is similarly restrained against axial movement by a plurality of bearings such as Ill, but in this instance each bearing is mounted in an eccentriccarrying member, such as H which maybe adjusted to alter. the center distance of rolls I, 8, by the means of segment arms, such as H, fixed on each eccentric member and each engaging pinions, such as l3, respectively fixed at opposite ends of a shaft I, the shaft having a squared end portion l5, to which a. suitable crank. not shown", may be applied.

The roll I is driven inthe direction of the arrow, Fig. 1, atarelatively high peripheral speed from a. suitable source such as a. motor IS,- the r drive in this instance being through pulleys I1, l8, and a belt".

The roll 8 is also driven, but may be at a relatively much lower rate, preferably oppositely to roll 1, and at a. variable rate. As here shown, roll 8 is driven from motor Ii through pulleys 20, II and belt 22, a speed reducer generally denoted by the numeral 23, which may be of any conventional form,- and a rate change device generally denoted by the numeral 24, which includes a belt 25 having angular sides complementary to angular faced pulley portions 25, 27,

mounted on a shaft 28 of the speed reducer 23 and axially movable relative to one another, the pulley portions being continuously urged axially toward one another by a spring 29. Belt 25 engages a pulley 24a. fixed on the extended end of roll 8 and is adapted to drive while engaging the pulley portions 26, 2'5 at various effective driving diameters, which may be changed by changing the center distance of shaft 28 and roll 8, the change being made by bodily adjusting the'speed reducer by the means of a threaded bolt 30 and nuts 3|, 32, the speed reducer being pivoted for movement about the axis of the shaft of motor It on the arms 33, 34. By the adjustable pulley means described the speed of roll 8 may be changed in the ratio of two or three to one, or even more, v

Both the roll 8 and roll I are peripherally grooved throughout their larger diameter with relatively closely spaced annular grooves, such for instance as 35, 36, as shown in Fig. 6, the

position of the rolls being such that the grooves engage less or more as determined by the adjustment of the eccentric members H. The roll '8 is also axially grooved, their being relatively fine grooves forming teeth such for instance as are indicated at 3'! in Fig. 1, extended axially through the large diameter and closely spaced around the entire periphery, the grooves being preferably in the form. of saw teeth pointed in the direction of rotation of the roll.

Casing 6 provides a well or reservoir-portion such as 38 constantly supplied with liquid by suitable means such for instance as a supplemental reservoir 39 containing liquid which is pumped into reservoir 38 at low pressure by a pump 43 driven from a motor 4|, and through an inlet 42 having a baflie 43, surplus liquid being returned to reservoir 39 through an overflow pipe 44, which is adjustable for altering the height of liquid in reservoir 38 by the means of nuts 45, 46.

The liquid in reservoir 38 contacts roll 8 less or more, according to the adjustment of 'overflow 44, and a film of liquid is continuously carried by roll 8 to the point where rolls 1, 8 are nearly in peripheral contact, at which point some of the liquid is sheared off by the rapidly movingsaw teeth of roll I in the form of very fine particles or drops varying in size according to the adjustment of overflow 44, the speed of roll 8 and the adjustment of the one roll relative to the other. These particles are of constant and uniform individual size as long as the various adjustments remain unchanged, the particles being of very fine size for the ordinary purposes of the machine.

The particles of liquid, by reason of the relatively-high speed of roll I, and in part by reason of the relative disposition of the rolls, are driven off substantially tangentially and substantially at right angles to the common plane of the roll centers, to form a band of spray particles substantially uniformly distributed through an angular space somewhat as indicated at 41, in Fig. 1, extending the entire length of the toothed portion of the rolls and without any material disturbance of the adjacent air.

The liquid particles or spray passes out of the casing 5 through an elongated shutter opening between wall surfaces 48, 89, Fig. 3, so disposed that the liquid in reservoir 38 will not overflow therethrough, and the spray is directed downwardly, in this instance onto the movingstrip I area of the band 4.

aovaaas or band l. For many purposes, as for instance where the band :3 is to be uniformly covered or sprayed with liquid the mechanism thus far disclosed would be suflicient, particularly if in addition to the spray regulating means described there were utilized some of the various well known means, not shown, for varying the linear speed at which the band 5 is traversed, whereby to further control the amount of liquid spread per unit of But afor many purposes, it is desirable to add other control mechanisms as follows.

A manually adjustable shutter, generally denoted by the numeral 50, is operable to control the width of the liquid spray in the direction of the movement of band 4. Shutter 50 includes a fixed member 5|, and a member 52 adjustable toward or from member 5i by manipulation of knobs or handles such as 53, 5d, similarly connected with member 52 by means such as rods 55, pins 55 and pin engaging members 5'i-which are fixed on member 52, there being detent means associated with the rods, such as the spring pressed plungers 5B engaging with one or the other of notches 55. When the member 52 is adjusted to overlap the member 5| no spray will pass out of the casing 6 and all the sprayed liquid will return to reservoir 38 through suitable channels within the casing.

The manually adjustable shutter 50, to some extent, provides means answering the same purpose as would a change in the speed of the band 4. If the shutter is adjusted for a narrow spray band the effect in reducingthe amount of liquid applied per unit of area of band 6 is approximately the same as would be obtained by a suitable increase in the speed at which the band passes through the spray zone 47, and vice versa.

An automatically controlled shutter is also provided, which is generally denoted by the numeral 66. Shutter 50 includes a shutter member 6! movable toward and from the fixed member 5i by the means of a shaft 52 which, at each end thereof, carries arms such as 63, having pins such as 34 engaging members such as 65 fixed with the member 6!. Shaft 62 is oscillated to open and close shutter 60 in predetermined timed relation with the linear movement of band 4, through mechanism providing for a variety of changes in the timing and in the opening and closing movements. v I

The mechanism connecting shutter 60 for antomatic movement includes a mechanical train as follows. A gear 63 fixed on the shaft 61 of roller 2 engages a gear 68 fixed on a shaft 53. Shaft 69 drives a shaft I0 through a timing device or rate changer generally denoted by the numeral 1 I, which comprises a plurality of reversible and interchangeably replaceable gear pairs of different ratio, which are adapted to be removably fixed on the ends of shafts 69, 10, the gears l2, l3 illustrating one of the gear pairs, and together providing any desired ratio of shaft Ill to the linear movement of band 4.

Shaft I0 drives a cam 14. through meshed gears l5, E6, the cam being frictionally fixed for angular adjustment on a shaft 14a, by the means of a nut 14b. Cam 14 has suitable configurations for movement of a follower roll I? carried by a pivoted lever 18 which carries a pivot F9 for movement of a rod 80, the follower roll'll being conends on the rodsjdd, 82. Rod 82 is pivoted at M on a member 85 which is adjustable on a lever arm M by the means of a screw t'l', the arm 86 being fired on the shaft 62.

By the means of the mechanism just described the shutter ht can be opened and closed at predetermined spaced intervals in the movement of band t, the number of such opening and closing movements per linear unit of band movement being determined by the rate change device H, and may also be varied if desired by changing the number of lobes or depressions provided in cam The width of opening of shutter movement can be adjusted by the screw ti! and can also be detered by the depth of the depressions in earn it. The slope of the depressions in cam it may be varied to eiiect either abrupt or gradual opening and closing of the shutter til. The relative position of the movement of shutter member can be readily adjusted by the adjustment of the turnbuckle device it, whereby the shutter til may be completely closed to overlap member ill at one point in its movement or may be partly open atits most nearly closed position.

In many instances the manual shutter it will be fully open during the use of the automatic shut: ter bill. In other instances it will be found desirable to control the maximum width of the spray during operation of the automatic shuts ter by adjusting shutter it to a point where it limits the maximum spray width.

it may also be noted that the automatic opening and closing of shutter lit need not be used unless desired or necessary. Thus, if the gear pairit, til is removed, or the shutter lit otherwise disconnected from roll i, the shutter til becomes merely a manually operable shutter which may be adjusted for various widths of shutter opening by the means of the screws t'l. tic, or other suitable means.

It will, or course, be obvious that either or both i or" the shutters it, it may be made in sections separately adjustable, whereby to individually control diflerent portions of the spraypath or zone in the direction of the ams of the rolls. Such construction would merely require shorter sec- I tions for the shutters and a duplication of the adjusting means shown, and is therefore not shown in detail. g r

in many instances it is desirable to maintain the sprayed liquids at predetermined temperatures, higher than room temperatures. This might be true in order to control the rate at which a sprayed liquid will dry out on the material of band t, or in instances where the material of the spray is normally solid or too viscous to form an eflective spray until heated. The material in the auxiliary reservoir it may be maintained at desired temperatures by any suitable well lmown means, not shown. For heating the material within the reservoir 38 there is provided electric heating means including resistance wires, such as strip tt having insulated resistance wires tit. A number of such heating elements may be arranged at various points inside or outside the walls of easing 8.

Additional heating means may be provided for each of the rolls l, 8, consisting of a plurality of insulated resistance wires, such as W, ti, carried by the rolls. These wires may be carried in suitable drilled holes if desired, but are here shown fixed in channels or grooves such as Ma, did, the grooves being 'closed to provide a substantially unbroken roll surface by the means of members such as till), Mb, retained by screws such as 900, tic. 1

For supplying current to the resistance elements 90, 9|, each of the rolls' l, 8 is provided with commutator devices such as 92, which may include commutator segments such as 93, to which current is supplied by brush devices such as St, there being similar commutator and brush devices, not shown, for the roll I. It will be understood that the commutators provide annularly spaced segments in oppositely disposed pairs, the different segments of a pair being respectively connected with different ends of a resistance wire unit, the segments and wires being insulated from the rolls. Also that the brushes are spaced in pairs similarly to the segments, the diiierent brushes of a pair being respectively connected to the difierent terminals of a current supply source and each insulated from the frame, all in the usual manner for such devices.

It will be understood that the casing ii and rolls l, 8 may be of any desired length depending upon the desired width of the spray. v

For access to the rolls i, t, and to the interior of easing b, there is provided a hinged cover 95. When cover 95 is closed the entire spray mechanism is enclosed, and only the spray itself is projected outside the casing, there being substantially no movement of air into or out of the casing.

By reason of the avoidance of air current, both in forming and projecting the spray, the sprayed particles are confined almost completely to the area upon which they are permitted to be projected by the shutters ht, till, this area being very sharply defined. The surrounding air is substantially completely free of spray or particles of material sprayed, since there is little or no air movement to carry the spray particles.

What is claimed is:

1. In a spray forming machine, the combination of a rotatable feed roll carrying liquid and another rotatable roll non-contactingly adjacent thereto, said other roll providing rigidly spaced saw-like teeth, said rolls being positioned for said teeth during rotation to pick up separate particles of the liquid carried by said feed roll, and means for rotation of said rolls at speeds adapted to continuously feed said liquid and to tangentially eject said particles.

2. In a spray forming machine, the combination of a-rotatable feed roll carrying liquid, another rotatable roll adjacent thereto, said other roll providing spaced mutually transverse grooves forming saw-like teeth, said rolls being positioned Y for the individual teeth to separate individual particles of the liquid carried by said feed roll,

and means for rotation of said rolls at speeds and in relative directions adapted to continuously feed said liquid and to eject said liquid particles in a path simultaneously substantially tangent to both said rolls.

3.. In a spray forming machine, the combination of a rotatable annularly grooved feed roll carrying liquid, another rotatable roll adjacent thereto, and providing rigidly spaced teeth engaging the feed roll grooves, said rolls being positioned for the individual teeth during rotation to separate individual particles of the liquid carried by said feed roll, means for rotation of said rolls at speeds and in relative directions adapted to continuously feed said liquid and to eject said liquid particles in a path simultaneously substantially tangent to both of said rolls, and shutter means in said path and operative to control path.

4. In a spray forming machine, the combination of a rotatable feed roll carrying liquid, an-

other rotatable roll non-contactingly adjacent thereto, said other roll providing teeth rigidly fixed therewith in predetermined axial and annular spacing, said rolls being positioned for the individual teeth during rotation to separate individual particles of the liquid carried by said feed roll, means for rotation of said rolls at speeds and in relative directions adapted to continuously feedsaid liquid and to eject said liquid particles in a path simultaneously substantially tangent to both of said rolls, and shutter means mounted insaid simultaneously tangent path, to control the width of the spray of ejected particles in said path.

5. In a spray machine, the combination of a rotatable feed roll carrying liquid, another rotatable roll adjacent thereto, said-other roll providing teeth rigidly fixed therewith in predetermined axial and annular spacing, said rolls being positioned for the individual teeth during rotation to separate individual particles of the liquid carried by said feed roll, means for rotation of said rolls at speeds adapted to continuously feed said liquid and-to eject said liquid particles in a path' simultaneously substantially tangent to both of said rolls, shutter means mounted in said path and adjustable for a preferred width thereof, and timing means operative to open said shutter means to said preferred.

width and alternatively to close said shutter means at predetermined intervals.

6. In a spray machine, the combination of a rotatable feed roll carrying liquid, another rotatable roll adjacent thereto, said other roll providing teeth rigidly fixed therewith in predetermined axial and annular position, said rolls being positioned for the individual teeth during rotation to separate individual particles of the liquid carried by said feed roll, means for rotation of said rolls at speeds and in directions adapted to continuously feedsaid liquid and .to eject said liquid particles in a. path simultaneously substantially tangent to both of said rolls, and means for traversing material to be treated by said particles through said path.

7. In a spray machine, the combination of a rotatable feed roll carrying liquid, another rotatable roll adjacent thereto, said other roll providing teeth rigidly fixed therewith in predetermined axial and annular position, said rolls being positioned for the individual teeth during rotation to separate individual particles of the liquid carried by said feed roll, means for rotation of said rolls at speeds and in relative directions adapted to continuously feed said liquid and to eject said liquid particles in a path simultaneously substantially tangent to both of said rolls, means for movably supporting material to be treated by said particles in a position to intercept said path, means for traversing said material through said path, shutter means adjustably interposed in said path between said material and said rolls and means for adjusting said shutter means to control the width of said path outside said shutter means in the direction of movement of said material.

8. In a spray forming machine, the combination of a rotatable feed roll carrying liquid, another rotatable roll adjacent thereto, said other roll providing teeth rigidly fixed therewith in predetermined amal and annular position, said rolls being positioned for the individual teeth to separate in dividual particles of the liquid carried by said feed roll, means for rotation of said rolls at speeds and in directions adapted to continuously feed said liquid and to eject said liquid particles in a path simultaneously substantially tangent to both of said rolls, means for movably supporting material to be treated by said particles in a position to intercept said path, means for moving said material through said path at uniform speed, shutter means movably mounted in said path between said material and said rolls, and timing means for opening and closing said shutter means at intervals timed relative to the movement of said material.

9. In a spray forming machine, the combination of a rotatable feed roll carrying liquid, another rotatable roll adjacent thereto, said other roll providing teeth rigidly fixed therewith in predetermined axial and annular position, said rolls being positioned for the individual teeth to separate individual particles of liquid carried by said feed roll, means for rotation of said rolls at speeds and in directions adapted to continuously feed said liquid and to'eject said liquid particles in apath simultaneously substantially tangent to both of said rolls, means for movably supporting material to be treated by said particles in. a position to intercept said path, means for moving said material through said path at uniform speed, shutter means movably mounted in said path between said material and said rolls, timing means for opening said shutter means at intervalstimed relative to the movement of said material, and means adjustably controlling the I efiective width of minimum and maximum shutter opening.

10. In a spray forming machine, the combination of a reservoir containing liquid, a rotatable feed roller engaging said liquid and having annular grooves, another rotatable roller having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of spaced peripheral teeth, said rollers being positioned for said teeth to engage the grooves of the feed roller, means for rotation of said feed roller at a rate sufticient to feed said liquid to engage said teeth,- and means for rotation of said other roller at a rate sufficient to throw off said liquid from said teeth in separated particles in a path substantially tangent to both said rollers.

11. In a sprayforming machine, the combination of a reservoir containing liquid, a rotatable feed roller engaging said liquid and having annular grooves,- another roller having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of spaced peripheral teeth, said rollers being positioned for said teeth to engage the grooves of the feed roller, means for rotation of said feed roller at a rate sufficient to feed said liquid to .engage said teeth, means for rotation of said other roller at a rate sufiicient to throw ofi said liquid from said teeth simultaneously tangentially to both said rollers and in separated particles, and means for changing the average quantity of liquid in said particles.

12. In a spray forming machine, the combination of a reservoir containing liquid, a rotatable feed roller engaging said liquid and having annular grooves, another rotatable roller having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of spaced peripheral teeth, said rollers 2,078,228 being positioned for said teeth to engage the grooves of said feed roller, means for rotation of said iced roller at a rate sumcient to feed said liquid to engage said teeth, means for rotation of said other roller at a rate suflicient to throw ofl said liquid from said teeth simultaneously tangentially to both said rollers and in separated particles, and means for changing the relative rate of rotation of one of said rollers.

13. in a spray forming machine, the combination of a reservoir containing liquid, a rotatable feed roller engaging said liquid and having annular grooves, another rotatable roller having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of spaced peripheral teeth, said rollers being positioned for said teeth to engage the grooves of said reed roller, means for rotation of said teed roller at a rate sumcient to feed said liquid to engage said teeth, means for rotation of said other roller at a rate sumcient to throw oiit said liquid from said teeth substantially tangentially to both said rollers and in separated particles, and means for adjusting the center distance of said rollers.

i l. In a spray forming machine, the combina-- tion of a reservoir containing liquid, a rotatable teed roller engaging said liquid and having annular grooves, another rotatable roller having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of spaced peripheral teeth, said rollers being positioned for said teeth to engage the grooves of said feed roller, means for rotation of said feed roller at a rate sufiicient to feed said liquid to engage said teeth, means for rotation of said other roller at a rate sufiicient to throw off said liquid from said teeth simultaneously substantially tangentially to both said rollers in separated particles, means'lor adjusting the center distance of said rollers, and means for adjusting the relative rate of rotation of one oi. said rollers.

15. In a spray forming machine, the combination of a hollow casing, a reservoir containing liquid within said casing, a rotatable feed roller engaging said liquid and having annular grooves, another roller having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of uniformly spaced peripheral saw-like teeth, said rollers being positioned for said teeth to engage the grooves of said teed roller, means for rotation of said ieed roller at a rate scient to feed said liquid to engage said teeth, and means for rotation of said other roller at a rate sufficient to throw ofl said liquid from said teeth substantially tangentially to both said rollers and in separated particles, said casing providing an opening in said tangential path and determinative of the width of the stream of particles outside said casing.

16. In a spray forming machine, the combination of a hollow casing, a reservoir containing liquid within said casing, a rotatable feed roller engaging said liquid and having annular grooves, another rotatable roller having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of spaced peripheral teeth, said rollers being positioned lor said teeth to engage the grooves of said feed roller, means for rotation-of said feed roller at a rate scient to feed said liquid to engage said teeth, means for rotation of said other roller at a rate sufficient to throw on said liquid from said teeth substantially tangentially to both said rollers and in separated particles, adjustable shutter means providing an opening in said casing for the ejection of said particles outside said casing, and means, movably supporting material to be treated in the path of particles ejected through said shutter means.

17. In a spray forming machine, the combinationof a hollow casing, a reservoir containing liquid within said casing, a rotatable feed roller engaging said liquid and having annular grooves, another rotatable roller having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of spaced peripheral teeth, said rollers being positioned for said teeth to engage the grooves of said feed roller, means for rotation of said feed roller at a rate suificient to feed said liquid to engage said teeth, means for rotation of said other roller at a rate sumcient to throw on said liquid from said teeth substantially tangentially to both said rollers and in separated particles, shutter means providing an opening for the ejection of said particles outside said casing, means for the movable support of material in the path of said ejected particles, means for the movement of said material at uniform rate, and means for operating said shutter at intervals timed relative to the rate of movement of said material.

18. In a spray forming machine, the combination of a hollow casing, a reservoir containing liquid within said casing, a rotatable roller within said casing having annular grooves and having transverse grooves forming together with the annular grooves a multiplicity of spaced peripheral teeth rigidly fixed in predetermined axial and annular positiommeans to feed said liquid to engage said teeth, means for rotation of said roller at a rate sufiicient to throw off said liquid from said teeth in a path tangential to the point at which the liquid is applied thereto and in separated particles, shutter means providing an adjustable opening for the ejection of said particles outside said casing, means for movably supporting material in said path, means for the movement of said material through said path at uniform rate, timing means for operation of said shutter at intervals timed relative to the rate of movement of said material, and means for changing the relative timing of said shutter means.

19. In a machine for forming a liquid spray, the combination of a rotatable roll having peripheral saw-shaped teeth rigidly fixed in predetermined axial and annular position adapted to separately receive fluid particles, means for continuously applying said particles to said teeth, and means for rotation of said roll at a speed sum- .cient to separately continuously throw off said particles tangentially tothe point received by said teeth.

20. The method of forming a liquid spray which includes feeding the material to be sprayed to the points of saw-like teeth rigidly fixed and spaced on a rotating roller and rotating the roller at a speed sufficient to throw off substantially all of the applied liquid substantially at the instant applied and in a path substantially tangential to the point of application thereof.

21. In a spray formingmachine the combination of a rotatable feed roll having axially spaced annular grooves carrying liquid to be sprayed, another rotatable roll non-contactingly adjacent said 'feed roll and having peripherally spaced teeth arranged in axially spaced sets respectively operative in the different axially spaced feed roll grooves .to pick up liquid therefrom, and means for rotation of said rolls at speeds and in direc tions for said. teeth to continuously pick up and tangentially eject separate particles of said liquid.

22. The method of forming a liquid spray which includes continuous rotation of an annularly grooved feed roller carrying liquid to be sprayed aowaaas and tangentially ejecting parllcles of said liquid from another roller having peripherally spaced. teeth. in axially spaced sets respectively non-contaetingly engaging the cilfiex'ent grooves of said feed roller. 

